<template>
  <header class="header">
      <h1>todos</h1>
      <input class="new-todo" placeholder="请输入任务名称" autofocus 
      v-model.trim="caseName" 
      @keyup.enter="taskName"/>
  </header>
</template>
<script>
export default {
   name: 'TodoHeader',
   props: {
   },
   data () {
     return {
        caseName: '',
     }
   },

   methods: {
    taskName() {
        if(this.caseName === '') return
        this.$emit('taskName', this.caseName)
        this.caseName = ''
    }
   },
 }
</script>
<style scoped>
</style>